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Earthquakes are measured using seismographs

How earthquakes are measured

By Emily Smith, CNN Earthquakes are measured using seismographs, which monitor the seismic waves that travel through the Earth after an earthquake strikes. Scientists used the Richter Scale for many years but now largely follow the Modified Mercalli Intensity Scale, which the U.S. Geological Survey says is a more accurate measure of size. The Richter

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For millions of Americans across a large swath of the country

Polar air and a powerful winter storm put millions under winter alerts this holiday week

By Aya Elamroussi, CNN For millions of Americans across a large swath of the country, the holiday week is beginning with unrelenting below-freezing temperatures made even more miserable by heavy snow expected Tuesday and Wednesday in several central and northwestern states. A developing ‘bomb cyclone’ has prompted alerts from Washington state to Maryland that cover

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Astronomical winter officially begins this Wednesday and Jack Frost will arrive in full force.

Polar air and a powerful winter storm put millions under winter alerts this holiday week

By Aya Elamroussi, CNN For millions of Americans across a large swath of the country, the holiday week is beginning with unrelenting below-freezing temperatures made even more miserable by heavy snow expected Tuesday and Wednesday in several central and northwestern states. A developing ‘bomb cyclone’ has prompted alerts from Washington state to Maryland that cover

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Astronomical winter officially begins this Wednesday and Jack Frost will arrive in full force.

Get ready for a ‘polar plunge.’ The first week of winter brings snow and bitterly cold temperatures

By Allison Chinchar, CNN Meteorologist Astronomical winter officially begins this Wednesday and Jack Frost will arrive in full force. Temperatures will take a polar plunge this week, and even Florida won’t be spared, thanks to a strong high-pressure system sliding south from Canada. “Very cold Arctic air masses will envelop much of the central and

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Ice and snow will hammer East Coast states after same deadly storm system proved ‘more devastating’ than expected in the South

By Nouran Salahieh, Holly Yan, Monica Garrett and Brandon Miller, CNN The massive storm system that pulverized homes, killed three people in Louisiana and brought blizzard conditions to northern states will inflict a new wave of brutal weather starting Thursday. Significant ice and heavy snow will smother parts of the Mid-Atlantic and New England, forecasters

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Ice and snow start hammering East Coast states after same deadly storm system proved ‘more devastating’ than expected in the South

By Nouran Salahieh, Holly Yan, Monica Garrett and Amanda Watts, CNN The massive storm system that pulverized homes, killed three people in Louisiana and brought blizzard conditions to northern states is bringing a new wave of brutal weather starting Thursday. More than a foot of snow has covered parts of the upper Midwest since Monday,

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Ice and snow start hammering East Coast states after same deadly storm system proved ‘more devastating’ than expected in the South

By Nouran Salahieh, Holly Yan, Monica Garrett and Amanda Watts, CNN The massive storm system that pulverized homes, killed three people in Louisiana and brought blizzard conditions to northern states is bringing a new wave of brutal weather starting Thursday. More than a foot of snow has covered parts of the upper Midwest since Monday,

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Fierce snow and dangerous travel conditions will impact millions as a massive, deadly storm that spawned tornadoes plows east

By Holly Yan, Monica Garrett and Robert Shackelford, CNN The deadly storm system that destroyed homes in the South was producing more tornadoes, freezing rain, treacherous travel and power outages Wednesday. At least two people were killed Tuesday in Louisiana as the system’s vicious winds tore through communities from Oklahoma to Texas to Mississippi. Another

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Cars drive north on I-15 after an overnight storm in Lehi

Fierce snow and dangerous travel conditions will impact millions as a massive, deadly storm that spawned tornadoes plows east

By Holly Yan, Monica Garrett and Robert Shackelford, CNN The deadly storm system that destroyed homes in the South was producing more tornadoes, freezing rain, treacherous travel and power outages Wednesday. At least two people were killed Tuesday in Louisiana as the system’s vicious winds tore through communities from Oklahoma to Texas to Mississippi. Another

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